8540731720 has 16 divisors (see below), whose sum is σ = 19216646460. Its totient is φ = 3416292672.

The previous prime is 8540731709. The next prime is 8540731723. The reversal of 8540731720 is 271370458.

It can be written as a sum of positive squares in 2 ways, for example, as 8531477956 + 9253764 = 92366^2 + 3042^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8540731720.

It is not an unprimeable number, because it can be changed into a prime (8540731723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106759107 + ... + 106759186.

Almost surely, 2^8540731720 is an apocalyptic number.

It is an amenable number.

8540731720 is an abundant number, since it is smaller than the sum of its proper divisors (10675914740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8540731720 is a wasteful number, since it uses less digits than its factorization.

8540731720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213518304 (or 213518300 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 8540731720 is about 92416.0793368773. The cubic root of 8540731720 is about 2044.0822171960.

The spelling of 8540731720 in words is "eight billion, five hundred forty million, seven hundred thirty-one thousand, seven hundred twenty".